Valve supervisory switch

Abstract

A switch is mounted on a plate within a housing having a housing body with a port and a removable housing cover. A switch actuator rod is mounted on a pivot within a sleeve that may be coupled to the housing so that the rod extends through the port and engages the switch within the housing. A linear actuator rod is slideably mounted within a sleeve which also may be coupled to the housing so that the rod extends through the port and engages the switch. A spring is mounted on the housing cover in a direction traverse to the arc through which the swing actuator rod pivots so that it engages the end of rod and biases it away from the switch. By removing the cover, moving the rod to the opposite end of its arc, and replacing the cover, the direction of engagement of the rod with the spring may be changed. The switch plate is movable along the rod's arc of pivot so that the switch trip point along the arc may be adjusted.

What is claimed is: 
     
       1. A valve supervisory switch for supervising a valve having a movable portion, said supervisory switch comprising: a housing having a port;   a switch within said housing, said switch including a switch actuating means;   a swing actuator member;   pivot means for pivotable supporting said swing actuator member;   a linear actuator member;   means for supporting said linear actuator member while permitting it to move linearly;   coupling means for permitting coupling of said swing actuator member to said housing with said swing actuator member extending through said port and engagable with said switch actuating means for actuating said switch and for permitting coupling of said linear actuator member to said housing with said linear actuator member extending through said port and engagable with said switch actuating means for actuating said switch; and   means for attaching said housing to said valve with one of said actuator members coupled to said housing by said coupling means and actuable by said movable portion of the valve.   
     
     
       2. A supervisory switch as in claim 1 wherein said swing actuator member is movable about an arc when coupled to said housing and said supervisory switch further comprising means for changing the trip point of said switch along said arc. 
     
     
       3. A supervisory switch as in claim 2 wherein said means for changing the trip point of said switch comprises means for changing the position of said switch along said arc. 
     
     
       4. A supervisory switch as in claim 1 wherein said swing actuator member is pivotable about an arc when coupled to said housing and further including a resilient means attached to said housing in a direction traverse to and intersecting said arc. 
     
     
       5. A supervisory switch as in claim 4 and further including, means for permitting sadi swing actuator member to engage said resilient means from either direction along said arc. 
     
     
       6. A supervisory switch as in claim 5 wherein means for permitting said swing actuator member to engage said resilient means from either direction comprises a removable cover portion of said housing, and said resilient means is attached to said cover portion. 
     
     
       7. A valve supervisory switch for supervising a valve having a movable portion, said supervisory switch comprising; a switch having a switch actuating means;   a swing actuator member;   a resilient member;   a pivot means for pivotably supporting said swing actuator member so that said swing actuator trips said switch actuating means along the arc through which it pivots and engages said resilient member along said arc;   means for changing the direction along said arc in which said swing actuator member engages said resilient member; and   means for supportably attaching said switch, said swing actuator member, said pivot means and said resilient member to a valve assembly with said actuator member actuatable by said movable portion of the valve.   
     
     
       8. A valve supervisory switch for supervising a valve having a movable portion, said supervisory switch comprising: a switch having a switch actuating means;   a switch actuator member;   a pivot means for pivotably supporting said swing actuator so that said swing actuator trips said switch actuating means as it moves along the arc through which it pivots;   resilient means for applying a bias force to said swing actuator member in a direction along said arc;   means for changing the direction of said bias force on said swing actuator member; and   means for supportably attaching said switch, said swing actuator member, said resilient means and said pivot means to said valve assembly with said actuator member engaging actuable by said movable portion of said valve.